我有一个简单的查询,可以很好地在SQL工作台中对concat进行分组。
class myApp extends React.PureComponent {
render() {
const { isConnected, isSignedIn, isSigningIn } = this.props;
if (!isConnected || isSigningIn) {
return <RouterStack />;
} else if (isSignedIn) {
return <RouterStack />;
}
return <Login />;
}
}
myApp.propTypes = {
isConnected: PropTypes.bool,
isSignedIn: PropTypes.bool,
isSigningIn: PropTypes.bool,
};
// if Meteor.something() is null, !!Meteor.something() is false
// if Meteor.something() is a valid object, !!Meteor.something() is true
export default createContainer(() => ({
isConnected: !!Meteor.status().connected,
isSignedIn: !!Meteor.user(),
isSigningIn: !!Meteor.loggingIn(),
}), myApp);
预期输出:
this.state = {
services : [{service: "s1", value: false},
{service: "s2", value: false},
{service: "s3", value: false},
]
};
handleServiceCheck = (i) => {
let services = this.state.services;
services[i].value = !services[i].value;
this.setState({ services: services });
};
this.state.services.map((service, i) => (
<FormControlLabel key={i}
control={
<Checkbox
checked={service.value}
onChange={() => this.handleServiceCheck(i)}
value={service.service}
className={classes.checkBox}
/>
}
label={service.service}
/>
))
如何使用MS SQL Server获得此输出?